# Locate SDL2 library # This module defines # SDL2_LIBRARY, the name of the library to link against # SDL2_FOUND, if false, do not try to link to SDL2 # SDL2_INCLUDE_DIR, where to find SDL.h # # This module responds to the the flag: # SDL2_BUILDING_LIBRARY # If this is defined, then no SDL2main will be linked in because # only applications need main(). # Otherwise, it is assumed you are building an application and this # module will attempt to locate and set the the proper link flags # as part of the returned SDL2_LIBRARY variable. # # Don't forget to include SDLmain.h and SDLmain.m your project for the # OS X framework based version. (Other versions link to -lSDL2main which # this module will try to find on your behalf.) Also for OS X, this # module will automatically add the -framework Cocoa on your behalf. # # # Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration # and no SDL2_LIBRARY, it means CMake did not find your SDL2 library # (SDL2.dll, libsdl2.so, SDL2.framework, etc). # Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again. # Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value # as appropriate. These values are used to generate the final SDL2_LIBRARY # variable, but when these values are unset, SDL2_LIBRARY does not get created. # # # $SDL2DIR is an environment variable that would # correspond to the ./configure --prefix=$SDL2DIR # used in building SDL2. # l.e.galup 9-20-02 # # Modified by Eric Wing. # Added code to assist with automated building by using environmental variables # and providing a more controlled/consistent search behavior. # Added new modifications to recognize OS X frameworks and # additional Unix paths (FreeBSD, etc). # Also corrected the header search path to follow "proper" SDL guidelines. # Added a search for SDL2main which is needed by some platforms. # Added a search for threads which is needed by some platforms. # Added needed compile switches for MinGW. # # On OSX, this will prefer the Framework version (if found) over others. # People will have to manually change the cache values of # SDL2_LIBRARY to override this selection or set the CMake environment # CMAKE_INCLUDE_PATH to modify the search paths. # # Note that the header path has changed from SDL2/SDL.h to just SDL.h # This needed to change because "proper" SDL convention # is #include "SDL.h", not . This is done for portability # reasons because not all systems place things in SDL2/ (see FreeBSD). #============================================================================= # Copyright 2003-2009 Kitware, Inc. # # Distributed under the OSI-approved BSD License (the "License"); # see accompanying file Copyright.txt for details. # # This software is distributed WITHOUT ANY WARRANTY; without even the # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # See the License for more information. #============================================================================= # (To distribute this file outside of CMake, substitute the full # License text for the above reference.) SET(SDL2_SEARCH_PATHS ~/Library/Frameworks /Library/Frameworks /usr/local /usr /sw # Fink /opt/local # DarwinPorts /opt/csw # Blastwave /opt ) FIND_PATH(SDL2_INCLUDE_DIR SDL.h HINTS $ENV{SDL2DIR} PATH_SUFFIXES include/SDL2 include PATHS ${SDL2_SEARCH_PATHS} ) FIND_LIBRARY(SDL2_LIBRARY_TEMP NAMES SDL2 HINTS $ENV{SDL2DIR} PATH_SUFFIXES lib64 lib PATHS ${SDL2_SEARCH_PATHS} ) IF(NOT SDL2_BUILDING_LIBRARY) IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework") # Non-OS X framework versions expect you to also dynamically link to # SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms # seem to provide SDL2main for compatibility even though they don't # necessarily need it. FIND_LIBRARY(SDL2MAIN_LIBRARY NAMES SDL2main HINTS $ENV{SDL2DIR} PATH_SUFFIXES lib64 lib PATHS ${SDL2_SEARCH_PATHS} ) ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework") ENDIF(NOT SDL2_BUILDING_LIBRARY) # SDL2 may require threads on your system. # The Apple build may not need an explicit flag because one of the # frameworks may already provide it. # But for non-OSX systems, I will use the CMake Threads package. IF(NOT APPLE) FIND_PACKAGE(Threads) ENDIF(NOT APPLE) # MinGW needs an additional library, mwindows # It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows # (Actually on second look, I think it only needs one of the m* libraries.) IF(MINGW) SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW") ENDIF(MINGW) IF(SDL2_LIBRARY_TEMP) # For SDL2main IF(NOT SDL2_BUILDING_LIBRARY) IF(SDL2MAIN_LIBRARY) SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP}) ENDIF(SDL2MAIN_LIBRARY) ENDIF(NOT SDL2_BUILDING_LIBRARY) # For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa. # CMake doesn't display the -framework Cocoa string in the UI even # though it actually is there if I modify a pre-used variable. # I think it has something to do with the CACHE STRING. # So I use a temporary variable until the end so I can set the # "real" variable in one-shot. IF(APPLE) SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa") ENDIF(APPLE) # For threads, as mentioned Apple doesn't need this. # In fact, there seems to be a problem if I used the Threads package # and try using this line, so I'm just skipping it entirely for OS X. IF(NOT APPLE) SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT}) ENDIF(NOT APPLE) # For MinGW library IF(MINGW) SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP}) ENDIF(MINGW) # Set the final string here so the GUI reflects the final state. SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found") # Set the temp variable to INTERNAL so it is not seen in the CMake GUI SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "") ENDIF(SDL2_LIBRARY_TEMP) if(BUILD_ENGINE_JS) set(SDL2_LIBRARY "sdl2_emscripten_internal" CACHE STRING "emscripten override" FORCE) set(SDL2_INCLUDE_DIR "${CMAKE_SYSTEM_INCLUDE_PATH}/SDL" CACHE STRING "emscripten override" FORCE) endif() INCLUDE(FindPackageHandleStandardArgs) FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)